Stateless MCP

Stateless MCP: The 2026-07-28 model with no initialize handshake and no Mcp-Session-Id; each request carries version and capabilities in _meta. Example: Cloudflare portals support stateless 2026-07-28 clients. Next in the glossary is stdio transport: The MCP binding where a client launches the server as a subprocess and exchanges newline-delimited JSON-RPC over standard streams.

Definition

The 2026-07-28 model with no initialize handshake and no Mcp-Session-Id; each request carries version and capabilities in _meta.

Example, with source

Cloudflare portals support stateless 2026-07-28 clients. (developers.cloudflare.com, read 4 November 2026)

Where it appears on this site

• MCP
• Hosts and gateways compared

Neighbouring terms

• server/discover: The 2026-07-28 RPC every server MUST implement to advertise supported protocol versions, capabilities and identity.
• stdio transport: The MCP binding where a client launches the server as a subprocess and exchanges newline-delimited JSON-RPC over standard streams.
• Step-up authorization: Requesting a wider scope set after a 403 insufficient_scope challenge, keeping previously granted scopes.